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参数资料
| 型号： | LTC1647-2IS8#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 10/22页 |
| 文件大小： | 239K |
| 描述： | IC CONTROLLR HOTSWAP DUAL 8-SOIC |
| 标准包装： | 2,500 |
| 类型： | 热交换控制器 |
| 应用： | 通用 |
| 内部开关： | 无 |
| 电源电压： | 2.7 V ~ 16.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
LTC1647-1/
LTC1647-2/LTC1647-3
10
1647fa
BLOCK DIAGRAMS
14
+
50約
FILTER
+
1.21V
50mV
CHANNEL ONE
CHANNEL TWO
(DUPLICATE OF CHANNEL ONE)
10糀
CP
+
50糀
FAULT
2.45V
UVL
CHARGE
PUMP
REFERENCE
1.21V
SENSE2
4
ON2
5
FAULT2
1647-1/2/3 BD3
16
V
CC2
12 GATE2
8
GND
CP
V
CC
SELECTION
15
SENSE1
13 GATE1
3
FAULT1
2
ON1
1
V
CC1
LTC1647-3
V
CC
Selection Circuit
The LTC1647-3 features separate supply inputs (V
CC1
and V
CC2
) for each channel. The reference and charge
pump circuit draw supply current from the higher of the
two supplies. An internal V
CC
selection circuit detects and
makes the power connection automatically. This allows
a 3V channel to have standard MOSFET gate overdrive
when the other channel is 5V. An internal Zener clamps
GATE about 15V above V
CC
.
If both supplies are connected together (internally for
LTC1647-1 and LTC1647-2 or externally for LTC1647-3),
the reference and charge pump circuit draw equal current
from both pins.
APPLICATIONS INFORMATION
Electronic Circuit Breaker
Each channel of the LTC1647 features an electronic circuit
breaker to protect against excessive load current and short-
circuits. Load current is monitored by sense resistor R1 as
shown in Figure 1. The circuit breaker threshold, V
CB
, is
50mV and it exhibits a response time, t
FAULT
, of approximately
300ns. If the voltage between V
CC
and SENSE exceeds V
CB
for more than t
FAULT
, the circuit breaker trips and immediately
pulls GATE low with a 50mA current sink. The MOSFET turns
off and FAULT pulls low. The circuit breaker is cleared by
pulling the ON pin low for a period of at least t
RESET
(50約).
A timing diagram of these events is shown in Figure 2.
The value of the sense resistor R1 is given by:
R1 = V
CB
/I
TRIP
(?
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| LTC1647-3CGN | 功能描述:IC CTRLR HOTSWAP DUAL 16SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:100 系列:- 类型:热插拔开关 应用:通用 内部开关:是 电流限制:可调 电源电压:9 V ~ 13.2 V 工作温度:-40°C ~ 150°C 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-TDFN-EP（3x3） 包装:管件 |
| LTC1647-3CGN#PBF | 功能描述:IC CTLR HOTSWAP DUAL 16-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:119 系列:- 类型:热交换控制器 应用:通用型，PCI Express? 内部开关:无 电流限制:- 电源电压:3.3V，12V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:80-TQFP 供应商设备封装:80-TQFP（12x12） 包装:托盘 产品目录页面:1423 (CN2011-ZH PDF) |
| LTC1647-3CGN#TR | 功能描述:IC CTRLR HOTSWAP DUAL 16SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:100 系列:- 类型:热插拔开关 应用:通用 内部开关:是 电流限制:可调 电源电压:9 V ~ 13.2 V 工作温度:-40°C ~ 150°C 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-TDFN-EP（3x3） 包装:管件 |
| LTC1647-3CGN#TRPBF | 功能描述:IC CTRLR HOTSWAP DUAL 16SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:100 系列:- 类型:热插拔开关 应用:通用 内部开关:是 电流限制:可调 电源电压:9 V ~ 13.2 V 工作温度:-40°C ~ 150°C 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-TDFN-EP（3x3） 包装:管件 |
| LTC1647-3IGN | 功能描述:IC CTRLR HOTSWAP DUAL 16SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:100 系列:- 类型:热插拔开关 应用:通用 内部开关:是 电流限制:可调 电源电压:9 V ~ 13.2 V 工作温度:-40°C ~ 150°C 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-TDFN-EP（3x3） 包装:管件 |
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